If the resistance values in a Wheatstone bridge are all equal, what can be inferred about the bridge?
Correct Answer: The bridge is balanced.
- Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown resistances.
- Step 2: Identify the components of the Wheatstone bridge. It has four resistors and a galvanometer.
- Step 3: Recognize that the four resistors are usually labeled as R1, R2, R3, and R4.
- Step 4: If all resistors (R1, R2, R3, R4) are equal, it means R1 = R2 = R3 = R4.
- Step 5: In a balanced Wheatstone bridge, the ratio of the resistances in one branch is equal to the ratio in the other branch.
- Step 6: Since all resistances are equal, the ratios are equal (R1/R2 = R3/R4), which means the bridge is balanced.
- Step 7: When the bridge is balanced, there is no potential difference across the galvanometer.
- Step 8: Therefore, zero current flows through the galvanometer.
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